| /* |
| * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.misc; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.Properties; |
| import java.util.Set; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| import java.util.jar.Attributes; |
| |
| /* |
| * Support class used by JVMTI and VM attach mechanism. |
| */ |
| public class VMSupport { |
| |
| private static Properties agentProps = null; |
| /** |
| * Returns the agent properties. |
| */ |
| public static synchronized Properties getAgentProperties() { |
| if (agentProps == null) { |
| agentProps = new Properties(); |
| initAgentProperties(agentProps); |
| } |
| return agentProps; |
| } |
| private static native Properties initAgentProperties(Properties props); |
| |
| /** |
| * Write the given properties list to a byte array and return it. Properties with |
| * a key or value that is not a String is filtered out. The stream written to the byte |
| * array is ISO 8859-1 encoded. |
| */ |
| private static byte[] serializePropertiesToByteArray(Properties p) throws IOException { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(4096); |
| |
| Properties props = new Properties(); |
| |
| // stringPropertyNames() returns a snapshot of the property keys |
| Set<String> keyset = p.stringPropertyNames(); |
| for (String key : keyset) { |
| String value = p.getProperty(key); |
| props.put(key, value); |
| } |
| |
| props.store(out, null); |
| return out.toByteArray(); |
| } |
| |
| public static byte[] serializePropertiesToByteArray() throws IOException { |
| return serializePropertiesToByteArray(System.getProperties()); |
| } |
| |
| public static byte[] serializeAgentPropertiesToByteArray() throws IOException { |
| return serializePropertiesToByteArray(getAgentProperties()); |
| } |
| |
| /* |
| * Returns true if the given JAR file has the Class-Path attribute in the |
| * main section of the JAR manifest. Throws RuntimeException if the given |
| * path is not a JAR file or some other error occurs. |
| */ |
| public static boolean isClassPathAttributePresent(String path) { |
| try { |
| Manifest man = (new JarFile(path)).getManifest(); |
| if (man != null) { |
| if (man.getMainAttributes().getValue(Attributes.Name.CLASS_PATH) != null) { |
| return true; |
| } |
| } |
| return false; |
| } catch (IOException ioe) { |
| throw new RuntimeException(ioe.getMessage()); |
| } |
| } |
| } |